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Bias-controlled friction of InAs nanowires on a silicon nitride layer studied by atomic force microscopy
Halmstad University, School of Information Science, Computer and Electrical Engineering (IDE), Halmstad Embedded and Intelligent Systems Research (EIS), MPE-lab. (Nanovetenskap)
Avd. f. Fasta Tillståndets Fysik, Lunds Universitet, Sweden. (Nanometerkonsortiet)
Avd. f. Fasta Tillståndets Fysik, Lunds Universitet, Sweden. (Nanometerkonsortiet)
Avd. f. Fasta Tillståndets Fysik, Lunds Universitet, Sweden. (Nanometerkonsortiet)
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2010 (English)In: Physical Review B Condensed Matter, ISSN 0163-1829, E-ISSN 1095-3795, Vol. 82, no 3Article in journal (Refereed) Published
Abstract [en]

By studying how nanowires lying on a surface bend when pushed by an atomic force microscopy tip we are able to measure the friction between them and the substrate. Here, we show how the friction between InAs nanowires and an insulating silicon nitride layer varies when a dc voltage is applied to the tip during manipulation. The bias charges the capacitor formed by the wire and the grounded silicon back contact. Electrostatic forces increase the contact pressure and allow us to tune the friction between the wire and the silicon nitride surface. Using nanowires of about 40-70 nm diameter and a few microns in length we have applied biases in the range +12 to -12 V. A monotonic increase of the sliding friction with voltage was observed. This increase in friction with the normal force implies that the mesoscopic nanowire-surface system behaves like a macroscopic contact, despite the nanometer size of the contact in the direction of motion. The demonstrated bias-controlled friction has potential applications in MEMS/NEMS devices.

Place, publisher, year, edition, pages
College Park, Md.: American Physical Society , 2010. Vol. 82, no 3
Keywords [en]
Nanowire, nanofriction
National Category
Condensed Matter Physics
Identifiers
URN: urn:nbn:se:hh:diva-14203DOI: 10.1103/PhysRevB.82.035403ISI: 000279471500001Scopus ID: 2-s2.0-77956669905OAI: oai:DiVA.org:hh-14203DiVA, id: diva2:391340
Available from: 2011-01-24 Created: 2011-01-24 Last updated: 2018-04-03Bibliographically approved

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Conache, GabrielaPettersson, Håkan

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